Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 22-01-2021 and time 00:19:45 (Italy) in region 5 km SE Norcia (PG)

A magnitude ML 1.5 earthquake occured in region: 5 km SE Norcia (PG), on

  • 21-01-2021 23:19:45 (UTC)
  • 22-01-2021 00:19:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7590, 13.1410 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Norcia PG 6 4957 4957
Accumoli RI 11 667 5624
Cascia PG 11 3217 8841
Arquata del Tronto AP 13 1178 10019
Castelsantangelo sul Nera MC 15 281 10300
Cittareale RI 16 482 10782
Preci PG 16 724 11506
Poggiodomo PG 18 117 11623
Montegallo AP 18 523 12146
Amatrice RI 19 2657 14803
Monteleone di Spoleto PG 19 599 15402
Cerreto di Spoleto PG 20 1075 16477
Visso MC 20 1107 17584

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km SE of Foligno (57155 inhabitants)
46 Km E of Terni (111501 inhabitants)
47 Km W of Teramo (54892 inhabitants)
50 Km NW of L'Aquila (69753 inhabitants)
73 Km SE of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km NE of Tivoli (56533 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
94 Km W of Pescara (121014 inhabitants)
96 Km W of Chieti (51815 inhabitants)
100 Km SW of Ancona (100861 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.5 2021-01-21
23:19:45		 42.7587 13.1412 11 2021-07-12
16:55:05		 Bollettino Sismico Italiano INGV 88756741
Reviewed
Rev100 		ML 1.5 2021-01-21
23:19:45		 42.7595 13.1385 11 2021-01-21
23:28:55		 Sala Sismica INGV-Roma 86442131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-21 23:19:45 ± 0.04
Latitude 42.7587 ± 0.0018
Longitude 13.1412 ± 0.0024
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88756741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 223
Semi-minor axis of confidence ellipse (meter) 125
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 89
Circular confidence region, given by single value of horizontal uncertainty (meter) 220.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.07734
Epicentral distance of station farthest from the epicenter (degree) 0.43437
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 86442131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-21 23:28:55

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 88756741
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-04 03:01:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESX.HHZ. 2021-01-21T23:20:00.61 0.3 undecidable manual S 250 48.2184 90 0.11 71
IV.TERO.HHZ. 2021-01-21T23:19:58.65 0.6 undecidable manual S 112 40.626 90 0.17 48
IV.MF5.EHN. 2021-01-21T23:19:58.67 3.0 undecidable manual S 45 36.3414 90 1.35 0
IV.GUMA.HHZ. 2021-01-21T23:19:57.54 0.3 undecidable manual S 25 37.2294 90 -0.04 71
IV.ARRO.EHZ. 2021-01-21T23:19:57.59 0.6 undecidable manual S 237 36.5412 90 0.21 48
IV.CSP1.EHZ. 2021-01-21T23:19:57.88 0.6 undecidable manual S 8 37.3293 90 0.28 47
IV.CESI.HHZ. 2021-01-21T23:19:56.20 0.3 undecidable manual S 325 33.4443 90 -0.35 67
IV.CAMP.HHE. 2021-01-21T23:19:56.24 0.6 undecidable manual S 138 33.0447 90 -0.2 46
IT.MTCL.HGE. 2021-01-21T23:19:55.10 0.6 undecidable manual S 336 28.5492 90 -0.15 47
IV.FDMO.HHZ. 2021-01-21T23:19:55.73 0.1 undecidable manual S 352 31.1466 90 -0.22 93
IV.RM33.EHZ. 2021-01-21T23:19:54.90 1.0 undecidable manual S 168 28.3494 90 -0.3 23
IV.CESX.HHZ. 2021-01-21T23:19:54.04 0.1 undecidable manual P 250 48.2184 90 0.02 95
IV.GAVE.HNN. 2021-01-21T23:19:53.26 0.6 undecidable manual S 250 21.4674 90 -0.1 48
IV.MMO1.EHZ. 2021-01-21T23:19:53.39 0.6 undecidable manual S 44 21.7671 90 -0.04 49
IV.MTRA.EHZ. 2021-01-21T23:19:53.51 0.6 undecidable manual S 91 20.7681 90 0.32 48
IV.FEMA.HNE. 2021-01-21T23:19:53.84 0.6 undecidable manual S 342 23.754 90 -0.14 48
IV.SMA1.EHZ. 2021-01-21T23:19:53.23 0.6 undecidable manual S 132 21.2676 90 -0.09 48
IV.T1299.EHN. 2021-01-21T23:19:52.36 0.6 undecidable manual S 140 17.9709 90 -0.07 49
IV.CSP1.EHZ. 2021-01-21T23:19:52.26 0.1 undecidable manual P 8 37.3293 90 -0.09 95
IV.LNSS.HHZ. 2021-01-21T23:19:52.49 0.6 undecidable manual S 205 19.1697 90 -0.25 47
IV.GUMA.HHZ. 2021-01-21T23:19:52.66 0.6 undecidable manual P 25 37.2294 90 0.32 46
IV.ARRO.EHZ. 2021-01-21T23:19:52.51 0.1 undecidable manual P 237 36.5412 90 0.28 93
IV.TERO.HHZ. 2021-01-21T23:19:52.84 0.6 undecidable manual P 112 40.626 90 -0.02 48
IV.MF5.EHN. 2021-01-21T23:19:52.09 1.0 undecidable manual P 45 36.3414 90 -0.1 24
IV.CAMP.HHE. 2021-01-21T23:19:51.52 0.1 undecidable manual P 138 33.0447 90 -0.16 94
IT.MTCL.HGE. 2021-01-21T23:19:51.01 0.1 undecidable manual P 336 28.5492 90 0.01 98
IV.FDMO.HHZ. 2021-01-21T23:19:51.24 0.1 undecidable manual P 352 31.1466 90 -0.15 95
IV.CESI.HHZ. 2021-01-21T23:19:51.69 0.3 undecidable manual P 325 33.4443 90 -0.06 72
IV.RM33.EHZ. 2021-01-21T23:19:50.96 0.6 positive manual P 168 28.3494 90 0 49
IV.NRCA.HNZ. 2021-01-21T23:19:50.00 0.6 undecidable manual S 345 8.5803 127 -0.05 51
IV.FEMA.HNE. 2021-01-21T23:19:50.66 0.1 undecidable manual P 342 23.754 90 0.4 93
IV.SMA1.EHZ. 2021-01-21T23:19:49.88 0.6 negative manual P 132 21.2676 90 0 50
IV.T1299.EHN. 2021-01-21T23:19:49.48 0.1 undecidable manual P 140 17.9709 90 0.11 99
IV.GAVE.HNN. 2021-01-21T23:19:49.91 0.1 undecidable manual P 250 21.4674 90 0.01 100
IV.LNSS.HHZ. 2021-01-21T23:19:49.63 0.1 positive manual P 205 19.1697 90 0.09 100
IV.MMO1.EHZ. 2021-01-21T23:19:49.92 0.1 positive manual P 44 21.7671 90 -0.02 99
IV.MTRA.EHZ. 2021-01-21T23:19:49.76 0.6 undecidable manual P 91 20.7681 90 -0.05 49
IV.NRCA.HNZ. 2021-01-21T23:19:48.14 0.1 negative manual P 345 8.5803 127 0.15 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.2 0.00184 0.14 AML other m 2021-01-21T23:19:50.11
IV.NRCA.HHE. ML:2.2 0.0019199999999999998 0.14 AML other m 2021-01-21T23:19:50.11
IV.NRCA.HHN. ML:1.8 0.000812 0.46 AML other m 2021-01-21T23:19:50.67
IV.NRCA.HNN. ML:1.8 0.0007949999999999999 0.46 AML other m 2021-01-21T23:19:50.44
IV.LNSS.HHN. ML:1.4 0.00018449999999999999 1.46 AML other m 2021-01-21T23:19:53.02
IV.LNSS.HHE. ML:1.3 0.00016649999999999998 0.7 AML other m 2021-01-21T23:19:53.74
IV.SMA1.EHE. ML:1.5 0.0001955 1.18 AML other m 2021-01-21T23:19:54.78
IV.SMA1.EHN. ML:1.3 0.000133 0.98 AML other m 2021-01-21T23:19:55.67
IV.RM33.EHE. ML:1.4 0.00011399999999999999 0.9 AML other m 2021-01-21T23:19:56.10
IV.RM33.EHN. ML:1.3 0.00010075000000000001 0.24 AML other m 2021-01-21T23:19:56.36
IV.FDMO.HHE. ML:1.1 0.000057749999999999994 0.26 AML other m 2021-01-21T23:19:56.88
IV.CESI.HHN. ML:1.5 0.000143 1.68 AML other m 2021-01-21T23:19:56.87
IV.FDMO.HHN. ML:1.2 0.00007175 1.58 AML other m 2021-01-21T23:19:56.15
IV.CESI.HHE. ML:1.2 0.00007439999999999999 0.36 AML other m 2021-01-21T23:19:57.38
IV.TERO.HHE. ML:1.2 0.0000498 0.06 AML other m 2021-01-21T23:19:58.98
IV.TERO.HHN. ML:1.2 0.0000621 0.42 AML other m 2021-01-21T23:19:59.26
IV.RM33.HNN. ML:1.8 0.00028849999999999997 0.5 AML other m 2021-01-21T23:19:59.57
IV.CSP1.EHN. ML:1.6 0.00015455000000000002 0.86 AML other m 2021-01-21T23:19:59.45
IV.CSP1.EHE. ML:1.5 0.0001225 1.5 AML other m 2021-01-21T23:19:59.05
IV.RM33.HNE. ML:1.7 0.00028 1.04 AML other m 2021-01-21T23:20:11.59
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download